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Spiraea plants are hardy, deciduous-leaved shrubs. The leaves are simple and usually short stalked, and are arranged in a spiralling, alternate fashion. In most species, the leaves are lanceolate (narrowly oval) and about 2.5 to 10 centimetres (0.98 to 3.94 in) long.
Spiraea douglasii is a woolly shrub growing 0.91–1.83 metres (3–6 feet) tall from rhizomes, forming dense riverside thickets. [6]The leaves are 2.5–10.2 centimetres (1–4 inches) long and toothed towards the tips.
Fungal diseases; Annosus root disease Heterobasidion annosum. Spiniger meineckellum [anamorph] Armillaria root disease Armillaria solidipes. Armillaria spp. Black stain root disease Leptographium wageneri var. pseudotsugae: Blue stain fungus Grosmannia clavigera: Bleeding sap rot Stereum sanguinolentum: Brown crumbly rot Fomitopsis pinicola ...
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Bacterial diseases; Common name: Scientific name: Plants affected: Bacterial leaf spot Erwinia carotovora subsp. carotovora: D, Ds Bacterial leaf spot E. chrysanthemi:
Fungal diseases; Common name: Scientific name: Plants affected: Corynespora leaf spot Corynespora cassiicola: A Gray mold Botrytis cinerea. Botryotinia fuckeliana [teleomorph] A Myrothecium leaf spot Myrothecium roridum: A Phytophthora stem rot Phytophthora nicotianae var. parasitica = Phytophthora parasitica = Phytophthora nicotianae: A ...
List of foliage plant diseases (Vitaceae) List of Peperomia diseases; List of Radermachera sinica diseases This page was last edited on 21 March 2022, at 18:12 ...
Fungal diseases; Common name: Scientific name: Plants affected: Alternaria leaf spot Alternaria panax: B, D, Fl, P,S Anthracnose Colletotrichum trichellum: H Cercospora leaf spot Cercospora spp. B, S Damping-off Pythium spp. B,Fj,S Gray mold Botrytis cinerea: H Phyllosticta leaf spot Phyllosticta concentrica. Discochora philoprina [teleomorph] H